Leadership is about making others better as a result of your presence and making sure that impact lasts in your absence.
One way of looking at speech is to say that it is a constant stratagem to cover nakedness.
科学家必须有勇气捍卫自己的思想，即使它们不受欢迎。
友谊是人生最珍贵的财富。
A proof tells us where to concentrate our doubts.